Standard Bank not cancelling Short Term Insurance

Having experienced bad service from Standard Bank Short term Insurance in the past I decided to cancel my policy. I e-mailed the request on the 5th June this year. I wrote follow ups on the 9th, 11th and 12th requesting follow ups. I was never contacted or received any reply. I phoned on the 18th and was told that I had to supply proof of the new insurance quote. When asked why no one had contacted me to let me know I was told they had no explanation. So I sent off proof and was told that it took 15 to 20 working days to process. That means the policy should have been cancelled by no later than the 16th July. I phoned a few days later and was told again it would take up to 20 working days with no real answer on the status of my request so I had to be patient. It is now the 23rd and I see that the debit order is still going through and there has again been no attempt at communication by Standard Bank to let me know the status of the cancellation or why it has not been cancelled. This is the very reason why I am cancelling my policy, the service is appalling. They don't want to provide decent service but want your money every month. If I had a new claim would they ignore that as well